| NWS Forecast for: St. Charles County Issued by: National Weather Service Saint Louis, MO Last Update: 1059 AM CDT Tue Mar 24 2026 |  |
| This Afternoon: Mostly sunny. Highs in the lower 60s. Southeast winds 5 to 10 mph. Tonight: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 40s. Southeast winds around 5 mph. Wednesday: Sunny. Not as cool with highs in the upper 70s. South winds 5 to 10 mph. Wednesday Night: Mostly clear. Not as cool with lows in the lower 60s. South winds around 10 mph with gusts up to 20 mph. Thursday: Sunny, warmer with highs in the upper 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Thursday Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then rain after midnight. Much cooler with lows in the mid 40s. Chance of rain 80 percent. Friday: Mostly cloudy with a chance of rain in the morning, then partly sunny with a slight chance of rain in the afternoon. Much cooler with highs in the lower 50s. Chance of rain 50 percent. Friday Night And Saturday: Mostly clear. Lows in the lower 30s. Highs in the upper 50s. Saturday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. Sunday: Partly sunny. Highs in the mid 60s. Sunday Night And Monday: Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. | |
| Zone Forecast: St. Charles County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |